Abstract:As the basic industry of national economic construction,the steel industry has brought the problems of large consumption of resources and energy,high CO2 emission and so on,which has attracted the attention of domestic and foreign countries. Based on a certain iron and steel enterprise in northern China,this paper analyzes the coupling relationship of resources,energy and carbon emission in the iron and steel production process and the related influencing factors with three typical coupling relationships as examples. The result of energy saving supply curve analysis and life cycle water footprint analysis shows that there is a synergistic effect between energy consumption,water resource consumption and carbon emission of the case enterprise. For example,from the perspective of energy saving technology,19 cost-effective energy-saving technologies can reduce energy consumption by 6.01 GJ/t,at the same time,they can also reduce industrial fresh water consumption by 1.35 m3/t,water footprint by 4.81 m3/t and CO2 emission by 640.36 kg/t. Furthermore,the main influencing factors of the coupling relationship are analyzed,which are the power consumption structure,scrap input rate and the change of energy-saving technical parameters. This study provides theoretical basis and important reference for the sustainable development of China's iron and steel industry.
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